Mono- and polyamides of perfluoroalkyl-substituted unsaturated acids
CA 2425160 A1 · Owner: Kantamneni, Shobha · Inventors: Bochnik, Michael; Mueller, Karl Friedrich; Kantamneni, Shobha
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel perfluoroalkyl-substituted monodi- and poly-amide compounds which are reaction products of a mono-, di- or polyamide of 60 to 2000 molecular weight with a perfluoroalkyl substituted unsaturated acid or its corresponding lower alkyl ester and optionally a non-fluorinated amino-reactive compound such as an acid, ester, anhydride, epichlorohydrin isocyanate or urea, are useful as , internally or externally applied paper sizes to impart oil and grease resistance to paper, and as oil proofing coatings on textiles wood, masonry , and the like, or as high-performance surface active agents.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 9, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.